Write-Ahead Logging (WAL) in Apache Spark Streaming is a technique used for

Discuss writeahead logging in Apache Spark Streaming?

Question Posted / Brajesh Kumar Maurya

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Answer Posted / Brajesh Kumar Maurya

Write-Ahead Logging (WAL) in Apache Spark Streaming is a technique used for fault tolerance. It records all incoming data and operations on the data in log files, before writing them to the final result. In case of failures, Spark Streaming can replay the logs from the last checkpoint to recover and continue processing from where it left off.

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